sprof QUICKSTART

["Bhattacharya, Soubhik" <soubhik_bhattacharya at mentorg dot com>]

this mail is for someone who's fumbling the net to know how to use 
`sprof' and `LD_PROFILE' to profile a shared object (as I was doing just 
a while ago).

say, your application is called `my_app', which links against a shared 
object `my_sobj'. you've tried to use gprof for performance profiling 
and discovered that it does not provide any profiling information about 
the functions residing in my_sobj. so it's time you try sprof to know 
how your functions, which are in my_sobj, have fared.

#set the environment variable LD_PROFILE to the name of the shared obj
setenv LD_PROFILE my_obj
#run your application
my_app
#this should create a file /var/tmp/my_sobj.profile
#now run sprof
sprof my_sobj my_sobj.profile

I've done these on a RedHat 7.2 running on PIII. My system does not have 
any info manual for sprof. the man page sprof(1) only describes the 
options accepted by sprof.

AFAIK, sprof can profile only one shared object at a run. Also, it does 
not profile the application itself.

The following mail and its follow-ups in libc mailing list can be 
useful-- http://sources.redhat.com/ml/libc-alpha/2001-09/msg00155.html

Cheers!
Soubhik.


--
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Soubhik Bhattacharya
Member Technical Staff
Mentor Graphics
Hyderabad, India.
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